TWI703923B - Electrical noise suppressing device - Google Patents

Abstract

An electrical noise suppressing device includes: a power receiving circuit for receiving a power signal transmitted from a power adapter; a diode positioned between the positive terminal and negative terminal of the power receiving circuit to form a current loop; a graphite plate; and an electromagnetic wave absorber coupled with the graphite plate; wherein one of the anticathode and cathode of the diode is coupled with the graphite plate so that the graphite plate and the electromagnetic wave absorber are enabled to absorb electromagnetic waves and noises in the current loop.

Description

Electrical noise suppression device

The invention relates to electronic equipment, in particular to an electrical noise suppression device that can improve the operating efficiency of the electronic equipment.

In many household power systems, commercial power systems, or automobile and locomotive power systems, it is often because of unstable power supply, old circuit components, or degraded wiring, which will cause impurities in the electrical circuits of the entire system. Information, electromagnetic interference (EMI), electron scattering, static electricity, or noise and other undesirable conditions.

The aforementioned unsatisfactory conditions will reduce the operating performance of the overall system, and may also cause unexpected vibrations or additional noises of components in equipment that rely on many electronic devices to operate (for example, various automobiles and locomotives).

In view of this, how to reduce or eliminate the deficiencies in the above-mentioned related fields is indeed a problem to be solved.

This specification provides an embodiment of an electrical noise suppression device, which includes: a power receiving circuit for receiving a power signal from a power converter; a diode arranged between the positive and negative poles of the power receiving circuit Between, to form a current loop; a graphite plate; and an electromagnetic wave absorption part coupled to the graphite plate; wherein one of the anode and the cathode of the diode is coupled to the graphite plate, so that the graphite plate And the electromagnetic wave absorbing part can absorb electromagnetic waves and noise in the current loop.

This specification also provides an embodiment of an electrical noise suppression device, which includes: a power receiving circuit for receiving a power signal from a power converter; a diode disposed on the positive and negative poles of the power receiving circuit Between to form a current loop; A magnetic interference filter, coupled to one of the anode and cathode of the diode, is used to filter electromagnetic interference components in the current loop; an electrostatic absorption sheet, coupled to the electromagnetic interference filter, is used Absorb the electrostatic components in the current loop; a graphite plate coupled to the electrostatic absorption sheet; an electromagnetic wave absorption part coupled to the graphite plate; and an electromagnetic interference shielding pad located between the graphite plate and the electromagnetic wave absorption part It is used to absorb electromagnetic interference components in the current loop and act as a current conductor between the graphite plate and the electromagnetic wave absorbing part, so that the graphite plate and the electromagnetic wave absorbing part can absorb electromagnetic waves and noise in the current loop ; Wherein, the volume of the graphite plate is between 7% to 25% of the volume of the electromagnetic wave absorption portion.

One of the advantages of the above embodiment is that the electrical noise suppression device can absorb electromagnetic waves and noise in the power signal, and feed the processed results back to the power system where it is, so it can effectively reduce the electrical loop of the overall system. Various undesirable conditions such as noise, electromagnetic interference, electron scattering, static electricity, or noise.

Another advantage of the above embodiment is that the operation of the electrical noise suppression device does not need to be controlled by a complex microprocessor or sophisticated electronic circuit, so it can operate stably for a long time and minimize the possibility of failure.

Other advantages of the present invention will be explained in more detail with the following description and drawings.

100: electrical noise suppressing device (electrical noise suppressing device)

102: power adapter (power adapter)

104: connector (connector)

110: housing

112: connection port

120: current loop

222: power receiving circuit (power receiving circuit)

224: Diode (diode)

130: EMI filter

140: Electrostatic absorption sheet

242: Hollow portion

150: graphite plate

160: Electromagnetic wave absorber

170: EMI shielding gasket

FIG. 1 is a simplified combined schematic diagram of an electrical noise suppression device according to an embodiment of the present invention.

2 is an exploded schematic diagram of the simplified internal structure of the first embodiment of the electrical noise suppression device of the present invention.

3 is an exploded schematic diagram of the simplified internal structure of the second embodiment of the electrical noise suppression device of the present invention.

4 is an exploded schematic diagram of the simplified internal structure of the third embodiment of the electrical noise suppression device of the present invention.

5 is an exploded schematic diagram of the simplified internal structure of the fourth embodiment of the electrical noise suppression device of the present invention.

6 is an exploded schematic diagram of the simplified internal structure of the fifth embodiment of the electrical noise suppression device of the present invention.

7 is an exploded schematic diagram of the simplified internal structure of the sixth embodiment of the electrical noise suppression device of the present invention.

8 is an exploded schematic diagram of the simplified internal structure of the seventh embodiment of the electrical noise suppression device of the present invention.

9 is an exploded schematic view of the simplified internal structure of the eighth embodiment of the electrical noise suppression device of the present invention.

10 is an exploded schematic diagram of the simplified internal structure of the ninth embodiment of the electrical noise suppression device of the present invention.

The embodiments of the present invention will be described below in conjunction with related drawings. In the drawings, the same reference numerals indicate the same or similar elements or method flows.

Please refer to Figure 1 and Figure 2. FIG. 1 is a simplified assembly diagram of an electrical noise suppression device 100 according to an embodiment of the present invention. 2 is an exploded schematic diagram of the simplified internal structure of the first embodiment of the electrical noise suppression device 100.

In this embodiment, the electrical noise suppression device 100 includes: a housing 110, a connection port 112 provided on the housing 110, a current loop 120, an electromagnetic interference filter 130, and electrostatic The absorption sheet 140, the graphite plate 150, the electromagnetic wave absorption part 160, and the electromagnetic interference shielding pad 170.

In practice, the electromagnetic interference filter 130 can be implemented by various suitable EMI filter sheets or EMI filter plates. The electrostatic absorption sheet 140 can be realized by various suitable microwave absorbers or electrostatic absorption films. The electromagnetic wave absorbing part 160 can be realized by various suitable EMI absorbers or EMI noise absorbing materials. The electromagnetic interference shielding pad 170 can be implemented by various suitable conductive foams.

As shown in FIG. 2, the current loop 120 in the electrical noise suppression device 100 includes a power receiving circuit 222 and a diode 224. The power receiving circuit 222 is used to receive the power converter 102 The power signal Sin is transmitted through the connector 104 and the port 112. The diode 224 is arranged between the positive and negative poles of the power receiving circuit 222 to form a current loop.

During operation, the electrical noise suppression device 100 can receive power from various external devices such as power outlets, automobiles, and locomotives that can provide power to the electrical noise suppression device 100 through the power converter 102. The power converter 102 can convert the received power into a direct current form and transmit it to the connection port 112 of the electrical noise suppression device 100 through the transmission line and the connector 104 to enter the current loop 120 inside the electrical noise suppression device 100.

In practice, the power converter 102 can be implemented by various suitable AC-to-DC converters or DC-to-DC converters. For example, in the application of suppressing noise in the automotive power system, the power converter 102 can be implemented in the form of a car cigarette lighter connector capable of outputting a DC voltage signal.

As shown in FIG. 1, the electrostatic absorption sheet 140 in this embodiment surrounds the electromagnetic interference filter 130 and is located above the graphite plate 150, so it will be in contact with both the electromagnetic interference filter 130 and the graphite plate 150 at the same time. The electromagnetic interference shielding pad 170 is located between the graphite plate 150 and the electromagnetic wave absorbing part 160, and directly contacts both the graphite plate 150 and the electromagnetic wave absorbing part 160 to serve as a current conductor between the graphite plate 150 and the electromagnetic wave absorbing part 160.

During assembly, the electrostatic absorption sheet 140 can be directly wrapped around the outside of the electromagnetic interference filter 130 to form the structure of FIG. 1, or the electrostatic absorption sheet 140 can be bent into a structure with a hollow portion 242, and then the electromagnetic interference can be filtered The filter 130 is inserted into the hollow portion 242 of the static electricity absorption sheet 140. Please note that the implementation is not limited to the length of the electromagnetic interference filter 130 and the electrostatic absorption sheet 140. The length of the electromagnetic interference filter 130 can be slightly longer than the electrostatic absorption sheet 140, or slightly shorter than the electrostatic absorption sheet. 140.

In addition, the electromagnetic wave absorbing part 160 can be realized by using a block structure formed by folding a single soft EMI absorber multiple times, but this is only an example, and does not limit the actual implementation of the present invention. For example, a plurality of EMI absorbers or EMI noise absorbers may also be stacked in layers to form the electromagnetic wave absorber 160.

Due to the electromagnetic interference filter 130, electrostatic absorption sheet 140, graphite plate 150, electromagnetic wave absorption The receiving portion 160 and the electromagnetic interference shielding pad 170 are all conductors, so current can be conducted between the electromagnetic interference filter 130, the electrostatic absorption sheet 140, the graphite plate 150, the electromagnetic wave absorption portion 160, and the electromagnetic interference shielding pad 170.

In the embodiment of FIG. 2, the electromagnetic interference filter 130 is coupled to the anode of the diode 224. Therefore, the electromagnetic interference filter 130 can filter out electromagnetic interference components in some frequency bands in the current loop, the electrostatic absorption sheet 140 can absorb the electrostatic components in the current loop, and the graphite plate 150 and the electromagnetic wave absorption part 160 can absorb some frequency bands in the current loop. The electromagnetic interference shielding pad 170 can absorb electromagnetic interference components of some frequency bands in the current loop.

The aforementioned electromagnetic interference filter 130, electrostatic absorption sheet 140, graphite plate 150, electromagnetic wave absorption part 160, and electromagnetic interference shielding pad 170 have different signal processing frequency bands, but they can absorb multiple frequency bands in the power signal Sin when they work together. Electromagnetic waves and noise.

According to the results of the experiment, the volume of the aforementioned electromagnetic wave absorbing part 160 is designed to be between 40 and 80 cubic centimeters, which can achieve a better balance between the volume and the electromagnetic wave absorption effect. In addition, if the volume of the aforementioned graphite plate 150 is designed to be between 7% and 25% of the volume of the electromagnetic wave absorbing part 160, the overall power noise suppression effect produced is ideal.

In practice, as shown in FIG. 2, the electrostatic absorption sheet 140 or the graphite plate 150 can be modified to be coupled to the anode of the diode 224 to produce a similar effect to the aforementioned structure.

Please note that the aforementioned architecture in FIG. 1 and FIG. 2 is only an exemplary embodiment, and does not limit the actual implementation of the present invention. For example, FIGS. 3 to 10 are simplified schematic diagrams of the internal structure of other embodiments of the electrical noise suppression device 100 of the present invention.

As shown in FIG. 3, in practice, the electromagnetic interference filter 130, the electrostatic absorption sheet 140, or the graphite plate 150 in the structure of FIG. 2 described above can be coupled to the cathode of the diode 224 instead. In this coupling mode, the electromagnetic interference filter 130, the electrostatic absorption sheet 140, the graphite plate 150, the electromagnetic wave absorption portion 160, and the electromagnetic interference shielding pad 170 can also perform the functions of the embodiment in FIG. The embodiment has similar technical advantages.

As shown in Fig. 4, the electromagnetic interference filter 130 can also be changed to the graphite plate 150 in practice. Above, the electromagnetic interference filter 130 is brought into contact with the graphite plate 150, and the electrostatic absorption sheet 140 is simultaneously surrounded by both the electromagnetic interference filter 130 and the graphite plate 150, so that the electrostatic absorption sheet 140 is at the same time as the electromagnetic interference filter 130 and the graphite plate 150 People contact.

In the embodiment of FIG. 4, the electrostatic absorption sheet 140 directly contacts the electromagnetic wave absorption portion 160 or the electromagnetic interference shielding pad 170, and one of the electromagnetic interference filter 130, the electrostatic absorption sheet 140, or the graphite plate 150 is coupled to The anode of the diode 224. In the architecture of FIG. 4, the electromagnetic interference filter 130, the electrostatic absorption sheet 140, the graphite plate 150, the electromagnetic wave absorption portion 160, and the electromagnetic interference shielding pad 170 can also perform the same functions as the corresponding components in the aforementioned embodiment of FIG. 2. And produce similar technical advantages to the embodiment in FIG. 2.

As shown in FIG. 5, in practice, the electromagnetic interference filter 130, the electrostatic absorption sheet 140, or the graphite plate 150 in the aforementioned structure of FIG. 4 can be coupled to the cathode of the diode 224 instead. In this coupling mode, the electromagnetic interference filter 130, the electrostatic absorption sheet 140, the graphite plate 150, the electromagnetic wave absorption portion 160, and the electromagnetic interference shielding pad 170 can also perform the same functions as the corresponding components in the aforementioned embodiment of FIG. 2. And produce similar technical advantages to the embodiment in FIG. 2.

As shown in FIG. 6 and FIG. 7, in some applications where electromagnetic interference is less or does not affect system performance, the electromagnetic interference filter 130 in the embodiment of FIG. 4 or FIG. 5 may be omitted. In practice, the electrostatic absorption sheet 140 can be arranged above the graphite plate 150 in an unfolded form or a folded form, and is in contact with the graphite plate 150. Alternatively, as shown in FIGS. 6 and 7, the graphite plate 150 can also be covered with an electrostatic absorption sheet 140 and the electrostatic absorption sheet 140 is in direct contact with the electromagnetic wave absorption portion 160 or the electromagnetic interference shielding pad 170.

In the embodiment of FIG. 6, one of the electrostatic absorption sheet 140 and the graphite plate 150 may be coupled to the anode of the diode 224. In the embodiment of FIG. 7, one of the electrostatic absorption sheet 140 and the graphite plate 150 can be coupled to the cathode of the diode 224. In the aforementioned coupling manner of FIGS. 6 and 7, the other components in the electrical noise suppression device 100 can perform the same functions as the corresponding components in the embodiment in FIG. 2 and produce similar technical advantages as the embodiment in FIG. 2 .

As shown in FIGS. 8 and 9, in some applications where the static electricity is less or does not affect the performance of the system, the electrostatic absorption sheet 140 in the embodiment of FIG. 2 or FIG. 3 may be omitted. That is, the electromagnetic interference filter 130 is arranged above the graphite plate 150 and directly contacts the graphite plate 150. In the embodiment of FIG. 8, one of the electromagnetic interference filter 130 and the graphite plate 150 may be coupled to the anode of the diode 224. In the embodiment of FIG. 9, one of the electromagnetic interference filter 130 and the graphite plate 150 can be coupled to the cathode of the diode 224. In the aforementioned coupling manner of FIGS. 8 and 9, other components in the electrical noise suppression device 100 can perform the same functions as the corresponding components in the aforementioned embodiment of FIG. 2 and produce similar technical advantages as the embodiment of FIG. 2 .

As shown in FIG. 10, in some applications where both electromagnetic interference and static electricity are less or less affecting the system performance, the electromagnetic interference filter 130 and the electrostatic absorption sheet in the embodiment of FIG. 2 can also be modified. 140 is also omitted. In the embodiment of FIG. 10, the graphite plate 150 may be coupled to the anode or the cathode of the diode 224. In this case, the graphite plate 150, the electromagnetic wave absorbing part 160, and the electromagnetic interference shielding pad 170 can perform the same functions as the corresponding elements in the embodiment of FIG. 2 and produce similar technical advantages as the embodiment of FIG. 2.

Since the signals processed by the electrical noise suppression device 100 in the foregoing embodiments will be fed back to the power system where it is located via the power converter 102, it can effectively reduce the noise, electromagnetic wave interference, and electronics in the electrical circuit of the overall system. Various undesirable conditions, such as scattering, static electricity, or noise, improve the overall system performance.

When the aforementioned electrical noise suppression device 100 is applied to automobiles and locomotives, it can reduce the occurrence of unintended vibrations of some components of automobiles and locomotives caused by excessive electromagnetic waves and noise in the electronic system, and therefore can also reduce The amount of noise during the operation of steam and locomotives.

On the other hand, since the operation of the aforementioned electrical noise suppression device 100 does not need to be controlled by a complicated microprocessor or sophisticated electronic circuit, it can operate stably for a long time and minimize the possibility of failure.

Please note that the number, shape, or position of the electromagnetic wave absorbing portion 160 and the electromagnetic interference shielding pad 170 in the foregoing embodiments can be adjusted according to the actual circuit design needs, and not It is limited to the aspect illustrated in the foregoing embodiment.

In some embodiments, the graphite plate 150 can also be directly contacted with the electromagnetic wave absorption part 160, and the electromagnetic interference shielding pad 170 can be omitted.

In the specification and the scope of the patent application, certain words are used to refer to specific elements, and those skilled in the art may use different terms to refer to the same elements. This specification and the scope of the patent application do not use differences in names as a way of distinguishing elements, but use differences in functions of elements as a basis for distinguishing. The "include" mentioned in the specification and the scope of the patent application is an open term and should be interpreted as "include but not limited to". In addition, the term "coupled" herein includes any direct and indirect connection means. Therefore, if it is described in the text that the first element is coupled to the second element, it means that the first element can be directly connected to the second element through electrical connection, wireless transmission, optical transmission, etc., or through other elements or connections. The means is indirectly connected to the second element electrically or signally.

The description method of "and/or" used in the description includes one of the listed items or any combination of multiple items. In addition, unless otherwise specified in the specification, any term in the singular case also includes the meaning of the plural case.

The "power signal" in the specification and the scope of the patent application can be implemented in the form of voltage or current in practice.

The term "element" mentioned in the specification and the scope of the patent application includes the concept of component, layer, or region.

The size and relative size of some elements in the drawings will be enlarged, or the shape of some elements will be simplified, so as to more clearly express the content of the embodiment. Therefore, unless otherwise specified by the applicant, the shape, size, relative size, and relative position of each element in the drawings are only for convenience of description, and should not be used to limit the scope of the patent of the present invention. In addition, the present invention can be embodied in many different forms, and when explaining the present invention, it should not be limited to the embodiments presented in this specification.

For the convenience of description, some relative positions in space may be used in the manual Relevant descriptions describe the function of a certain element in the drawing or the relative spatial relationship between the element and other elements. For example, "above...", "above...", "below", "below...", "above...", "below...", "Up", "Down", etc. Those with ordinary knowledge in the technical field should understand that these descriptions related to relative positions in space not only include the orientation of the described elements in the diagram, but also include the use and operation of the described elements. , Or various orientation relationships during assembly. For example, if the schema is turned upside down, the element originally described with "on" will become "below". Therefore, in the description of the description of "于...上" used in the manual, the explanation includes two different directional relationships, "于...下" and "于...上". In the same way, the term "up" used here is interpreted as including two different directional relationships, "up" and "down".

In the specification and the scope of the patent application, if it is described that the first element is located on the second element, above the second element, connected, joined, coupled to, or connected to the second element, it means that the first element can be directly connected to the second element. Being on the second element, directly connected, directly bonded, or directly coupled to the second element can also mean that there are other elements between the first element and the second element. In contrast, if it is described that the first element is directly located on, directly connected, directly joined, directly coupled, or directly connected to the second element, it means that there are no other elements between the first element and the second element. .

The above are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should fall within the scope of the present invention.

100: Electrical noise suppression device

102: power converter

104: Connector

110: shell

112: Port

120: current loop

130: electromagnetic interference filter

140: Electrostatic absorption sheet

150: Graphite board

160: Electromagnetic wave absorption part

170: EMI shielding mat

Claims (10)

An electrical noise suppression device (100), comprising: a power receiving circuit (222) for receiving a power signal (Sin) from a power converter (102); a diode (224) arranged in Between the positive and negative poles of the power receiving circuit (222) to form a current loop; a graphite plate (150); and an electromagnetic wave absorption part (160) coupled to the graphite plate (150); wherein, the two poles One of the anode and the cathode of the body (224) is coupled to the graphite plate (150), so that the graphite plate (150) and the electromagnetic wave absorption part (160) can absorb electromagnetic waves and noise in the current loop. The electrical noise suppression device (100) according to claim 1, further comprising: an electromagnetic interference filter (130), coupled to the graphite plate (150), for filtering electromagnetic interference in the current loop Ingredients. The electrical noise suppression device (100) according to claim 1, further comprising: an electrostatic absorption sheet (140) coupled to the graphite plate (150) for absorbing electrostatic components in the current loop. The electrical noise suppression device (100) according to claim 3, wherein the electrostatic absorption sheet (140) is located above the graphite plate (150). The electrical noise suppression device (100) according to claim 3, wherein the electrostatic absorption sheet (140) surrounds the graphite plate (150). The electrical noise suppression device (100) according to claim 1, further comprising: an electromagnetic interference filter (130) coupled to one of the anode and the cathode of the diode (224) for Filtering out the electromagnetic interference components in the current loop; and an electrostatic absorption sheet (140), coupled to the electromagnetic interference filter (130), for absorbing the electrostatic components in the current loop. The electrical noise suppression device (100) according to claim 6, wherein the electrostatic absorption sheet (140) surrounds the electromagnetic interference filter (130) and is located above the graphite plate (150). The electrical noise suppression device (100) according to claim 6, wherein the electromagnetic interference filter (130) is located above the graphite plate (150), and the electrostatic absorption sheet (140) surrounds the electromagnetic interference filter at the same time (130) and the graphite plate (150). The electrical noise suppression device (100) according to any one of claims 1 to 8, further comprising: an electromagnetic interference shielding pad (170) located on the graphite plate (150) and the electromagnetic wave absorption part (160) It serves as a current conductor between the graphite plate (150) and the electromagnetic wave absorption part (160) and absorbs electromagnetic interference components in the current loop. An electrical noise suppression device (100), comprising: a power receiving circuit (222) for receiving a power signal (Sin) from a power converter (102); a diode (224) arranged in Between the positive and negative poles of the power receiving circuit (222) to form a current loop; an electromagnetic interference filter (130), coupled to one of the anode and the cathode of the diode (224), is used for filtering In addition to the electromagnetic interference components in the current loop; an electrostatic absorption sheet (140), coupled to the electromagnetic interference filter (130), for absorbing the electrostatic components in the current loop; a graphite plate (150), coupled On the electrostatic absorption sheet (140); an electromagnetic wave absorption portion (160) coupled to the graphite plate (150); and an electromagnetic interference shielding pad (170) located between the graphite plate (150) and the electromagnetic wave absorption portion ( 160), used to absorb electromagnetic interference components in the current loop, and used as a current conductor between the graphite plate (150) and the electromagnetic wave absorption part (160), so that the graphite plate (150) and the electromagnetic wave absorb The part (160) can absorb electromagnetic waves and noise in the current loop; wherein the volume of the graphite plate (150) is between 7% and 25% of the volume of the electromagnetic wave absorption part (160).

Images